基于图像处理的冬小麦植被覆盖率测定及其遗传解析

被引：7

作者：

肖永贵 ^{[1
]}

刘建军 ^{[2
]}

夏先春 ^{[1
]}

陈新民 ^{[1
]}

Matthew REYNOLDS ^{[3
]}

何中虎 ^{[1
,4
]}

机构：

[1] 中国农业科学院作物科学研究所/国家小麦改良中心

[2] 山东省农业科学院作物研究所

[3] CIMMYT,Apartado Postal -, México,DF

来源：

作物学报 | 2013年 / 39卷 / 11期

关键词：

普通小麦; 植被覆盖率; 关联分析; 遗传区段;

D O I：

暂无

中图分类号：

S512.11 [];

学科分类号：

摘要：

植被覆盖率是反映植株生长势的重要生理性状,在旱作地区尤为重要。图像处理技术能够快速有效地对苗期和孕穗期植被覆盖率进行量化分析。以28份山东小麦主栽品种和品系为材料,在240株m 2和360株m 2密度下,连续2年测定了孕穗前不同发育阶段的植被覆盖率,并利用921个DArT标记和83个SSR标记分析了与植被覆盖率相关的遗传区段。结果表明,不同密度下,冬小麦植被覆盖率在越冬期、返青期和孕穗期存在显著差异,而拔节期基本一致。拔节期植被覆盖率与春季最高分蘖数、抽穗后群体叶面积指数、单位面积穗数和籽粒产量均呈显著正相关,r=0.73～0.76(P<0.01),表明拔节期植被覆盖率可用于预测上述性状。共检测出12个遗传区段与植被覆盖率相关联,大部分区段直接参与调控苗期和孕穗期的生长势。10个遗传区段与已报道的苗期性状、产量性状及抗病位点一致,其中5BL、6AS和6BL染色体上携带的植被覆盖率相关遗传区段与已报道的苗期比叶面积和生物量等位点完全相同。建议将植被覆盖率作为生长势量化指标,用于育种选择和遗传研究。

引用

页码：1935 / 1943

页数：9

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